#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
void reverse_print(char* str) {
    if (*str == '\0') {
        return;
    }
    else 
    reverse_print(str + 1);
    putchar(*str);
}
int main() {
    char arr[] = "abcdef";
    reverse_print(arr);
    return 0;
}